From the University of Sydney: Rich finds on royal road.

University of Sydney archaeologists are uncovering the remains of a building used by travelling Persian royalty in the 5th century BC.

Situated in a fertile valley about 125 kms west of Shiraz, the building served royal travellers on the famous Royal Road — the route linking the capital Persepolis with Persia’s westernmost provincial capital Sardis, in Lydia*, according to the University of Sydney’s Professor Dan Potts.

"The so-called Royal Road was the main artery linking Lydia with Persepolis, and [continue, see photos]